unable to reach GPON GUI or telnet

[ks]

Hello,

I'm quite an OPNsense newbie and I'd like ask some help with the firewall.

I installed OPNsense 24.7 on a bare metal, with one dual SFP+ NIC. On this NIC are attached the LAN (10G module) and a Ethernet 1G module for the WAN connection.
The ethernet cable is connected to the provider' ONU in bridge mode that translate fiber connection into ethernet to the OPNsense firewall. OPNsense handle the PPPoE connection.

LAN side is a 10.0.0.0/24 network, and WAN side is a 192.168.1.0/24 network.

I can browse internet, do normal stuffs with the connection and I set a firewall Outbound rule to reach the provider ONU (it works). So basically everything works.

When I try to eliminate the external provider ONU and use the Leox LXT-010S-H GPON module directly attached to my bare metal OPNsense NIC, I cannot reach the GPON web interface, despite my attempt to properly set the firewall rules.

The GPON module is perfectly working, that I tested with an external media converter, and I guess the issue is in my firewalling settings.
I tried also to change the GPON IP setting (while in the external media converter) to match the provider' ONU (192.168.1.1/24) but cannot get the GPON web page.

Does somebody has suggestions how to properly setup the firewall rules in order to reach the GPON web and telnet interfaces, or any other hint to help me?

Many thanks in advance!